Checkbox "Show header text with your image." in Appearance > Header not working

This morning, it appears that the check box "Show header text with your image." under Appearance > Header stopped working. Even though we unchecked this checkbox, the title would still display over our header image. We were able to sort of fix it, but creating custom css, ex. #site-title a { display: none; }. But it would be better if you could fix the actual bug with the checkbox.

Yes I see the link in our blog. But, the issue with the link you provided above (which is the appropriate post for the issue) and if I follow your instructions, I do indeed get to the appropriate forum, but I am unable to respond to the post.